On Jul 31, 2011, at 7:54 PM, Rosario Garcia Gil wrote:
Hello
I have a problem on keeping the format when I export a matrix file
with the write.table() function.
The quick answer is ... don't do that. Use save() if you want to
preserve the attributes of an R object. And that especially applies if
you don't understand the differences between R object types.
I have discarded a longer answer that complained about your failure to
provide complete code.
--
David
When I import the data volcano from rgl package it looks like this
in R:
data[1:5,]
[,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12] [,
13] [,14]
[1,] 100 100 101 101 101 101 101 100 100 100 101
101 102 102
[2,] 101 101 102 102 102 102 102 101 101 101 102
102 103 103
[3,] 102 102 103 103 103 103 103 102 102 102 103
103 104 104
[4,] 103 103 104 104 104 104 104 103 103 103 103
104 104 104
[5,] 104 104 105 105 105 105 105 104 104 103 104
104 105 105
I use this data to represent a 3D map with the follwing script and
it works PEFECT!
y<- 2*data
x <- 10* (1:nrow(y))
z <- 10* (1:ncol(y))
ylim <- range(y)
ylen <-ylim[2] - ylim[1] + 1
colorlut <- terrain.colors(ylen)
col <- colorlut[y-ylim[1] + 1]
rgl.open()
rgl.surface(x,z,y, color=col, back="lines")
Then I export it as write.table(data, file="datam.txt",
row.names=TRUE, col.names=TRUE),
when I import it back into R again with read.table("datam.txt") it
looks like this in R:
V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 V11 V12 V13 V14 V15 V16 V17
V18 V19
1 100 100 101 101 101 101 101 100 100 100 101 101 102 102 102 102
103 104 103
2 101 101 102 102 102 102 102 101 101 101 102 102 103 103 103 103
104 105 104
3 102 102 103 103 103 103 103 102 102 102 103 103 104 104 104 104
105 106 105
4 103 103 104 104 104 104 104 103 103 103 103 104 104 104 105 105
106 107 106
5 104 104 105 105 105 105 105 104 104 103 104 104 105 105 105 106
107 108 108
The script I mention before does not anymore work on it, if I
converted to matrix with as.matrix still does not work.
I have read the pdf on import/export of R and searched by googleling
but I have not found any answer to my problem.
I am sorry if the answer is very obvious but I have tried for more
than a week.
Any help is really wellcome, thanks in advance.
Rosario
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD
West Hartford, CT
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
